Oscars: Academy apologizes for Asian jokes
The letter to AMPAS, signed by Ang Lee and George Takei, expressed 'disappointment' with 'perpetuation of racist stereotypes'
Academy expands membership to increase diversity among leadership
Actor Gael Garcia Bernal, producer Effie Brown, producer Reginald Hudlin, and 'Kung-Fu Panda' director Jennifer Yuh Nelson join ranks
